Mullewa trials - herbicides for selective spot spraying application on summer weeds


Research organisaton

Trial details

Researcher(s) Grant Thompson (Crop Circle Consulting)
Year(s) 2010
Contributor North East Farming Futures
Trial location(s) Mullewa, WA
Mullewa trials - herbicides for selective spot spraying application on summer weeds locations
  • To assess current and novel herbicides and mixes at elevated rates to achieve fast control of summer weeds through weedseeker selective spot spraying..
  • To plant trial plots to wheat to assess carryover or plantback issue with these treatments.
Key messages
  • Weed sensing and selective spot spraying with machinery such as the WEEDSEEKER and WEED-IT selective spot sprayers has allowed for very cost effective broadacre spot spraying of weeds without spraying the whole pad-dock area.
  • Selective spot spraying of hard to kill summer weeds is one application where this technology has a potential to save growers significant funds usually allocated to herbicides.
  • Elevated rates of non-traditional or previously cost prohibited herbicides of a different resistance group can now be used to achieve much more reliable and faster control of weeds.
  • Alliance, Gramoxone, Basta, Roundup Powermax and Ally provided acceptable levels of control on large Roly Poly at high rates suitable for selective spot spraying.
  • Hammer and Sharpen did not provide acceptable control of Roly Poly after initial impressive weed burndown.
  • Roundup Powermax, Garlon, Grazon, Kamba 500 and Tordon 75D all provided excellent Afghan Melon control.
  • Grazon, Kamba 500 and Tordon 75D caused herbicide toxicity issues in the wheat crop as per trial report.
Lead research organisation North East Farming Futures
Host research organisation N/A
Related program N/A
  • Grant Thompson, Crop Circle Consulting.
  • Bill Campbell, Nufarm
  • Bernie Quade, Landmark
  • Daisy Downs – C Crawford

Other trial partners Not specified
Download the trial report to view additional trial information


Crop type Wheat
Treatment type(s)
  • Herbicide: Type
  • Herbicide: Rate
Trial type Experimental
Trial design Replicated

Mullewa 2010

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Glyphosate 540 g/L, Gramoxone, Basta , Alliance, Ally, Kamba 500, Garlon,Grazon, Tordon 75D, Hammer, Estericide 680, Diuron Sc 500g/L, Hotshot, Sharpen, Bonza oil.

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: @T2:
# Variety
Control level (value) Control level (value)
1 Melons Afghan Garlon 200ml+Bonza 1% 9 10
1 Melons Afghan

Control level value

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Mullewa, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Mullewa, WA Tenosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Mullewa WA
2010 207.6mm
2009 223.4mm
2008 262.4mm
2007 203.9mm
2006 223.3mm
2005 238.8mm
2004 224.6mm
2003 220.0mm
2002 216.0mm
2001 206.5mm
2000 255.1mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties



Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Mullewa WA


Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.

Trial last modified: 25-06-2019 11:50am AEST